EA8934A

EA8934A Datasheet


Part Datasheet
EA8934A EA8934A EA8934A (pdf)
Related Parts Information
ACT8934AQJ258-T ACT8934AQJ258-T ACT8934AQJ258-T
ACT8934AQJ133-T ACT8934AQJ133-T ACT8934AQJ133-T
PDF Datasheet Preview
Advanced PMU for Samsung S3C2416/S3C2450
• Optimized for Samsung S3C2416/S3C2450

Processors
• Three Step-Down DC/DC Converters
• Four Low-Dropout Linear Regulators
• Integrated ActivePathTM Charger
• I2CTM Serial Interface
• Advanced Enable/Disable Sequencing Controller
• Minimal External Components
• Tiny 5x5mm TQFN55-40 Package
− 0.75mm Package Height − Pb-Free and RoHS Compliant

The ACT8934A is a complete, cost effective, highlyefficient ActivePMUTM power management solution, optimized for the unique power, voltagesequencing, and control requirements of the Samsung S3C2416/S3C2450 processors.

This device features three step-down DC/DC converters and four low-noise, low-dropout linear regulators, along with a complete battery charging solution featuring the advanced ActivePathTM system-power selection function.

The three DC/DC converters utilize a highefficiency, fixed-frequency 2MHz , current-mode PWM control architecture that requires a minimum number of external components. Two DC/DCs are capable of supplying up to 900mA of output current, while the third supports up to 700mA. All four lowdropout linear regulators are high-performance, low-noise regulators that supply up to 150mA, 150mA, 250mA, and 250mA, respectively.

The ACT8934A is available in a compact, Pb-Free and RoHS-compliant TQFN55-40 package.

TYPICAL APPLICATION DIAGRAM

ACT8934A

Innovative PowerTM ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP.

Copyright 2012 Active-Semi, Inc.

TABLE OF CONTENTS
General Information 01 Functional Block 03 Ordering 04 Pin Configuration 04 Pin 05 Absolute Maximum Ratings 07 I2C Interface Electrical Characteristics 08 Global Register Map 09 Register and Bit Descriptions 10 System Control Electrical 15 Step-Down DC/DC Electrical Characteristics 16 Low-Noise LDO Electrical 17 ActivePathTM Charger Electrical 18 Typical Performance 20

System control information 27 Interfacing with the Samsung 27 Control Signals 28 Push-Button 29 Control 29

Functional Description 32 I2C Interface 32

Voltage Monitor and 32

Thermal Shutdown 33

Step-Down DC/DC Regulators 34 General 34 100% Duty Cycle 34 Synchronous 34 Soft-Start 34 Compensation 34 Configuration 34 OK[ ] and Output Fault 35 PCB Layout Considerations 35

Low-Noise, Low-Dropout Linear 36 General 36 Output Current Limit 36 Compensation 36 Configuration 36 OK[ ] and Output Fault 36 PCB Layout Considerations 36

Innovative PowerTM ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP.

Copyright 2012 Active-Semi, Inc.

FUNCTIONAL BLOCK DIAGRAM

Optional

AC Adaptor USB
4.35V to 6V CHGIN ACIN

VSYS nSTAT

BODY SWITCH

ActivePath Control

CHGLEV

ISET OUT1
nRSTO
nPBIN PUSH BUTTON

OUT1 nPBSTAT

OUT1 nIRQ

VSYS

PWRHLD

PWREN VSEL

LBI VSYS
nLBO
1.2V

REFBP

Reference

ACT8934A

VSYS System Supply

BODY SWITCH

CHARGE STATUS

Charge Control

CURRENT SENSE

VOLTAGE SENSE PRE-

CONDITION
2.85V

THERMAL

REGULATION
ORDERING INFORMATION

VOUT1/VSTBY1

VOUT2/VSTBY2

VOUT3/VSTBY3

VOUT4

VOUT5

VOUT6

VOUT7

PACKAGE

PINS

TEMPERATURE RANGE

ACT8934AQJ133-T 3.3V/3.3V 1.8V/1.8V 1.3V/1.3V 1.2V 1.2V 1.2V 3.3V TQFN55-40 -40°C to +85°C

ACT8934AQJ258-T 3.3V/3.3V 1.8V/1.8V 1.25V/1.25V 1.2V 1.2V 1.2V 3.3V TQFN55-40 -40°C to +85°C

ACT8934AQJ333-T 3.3V/3.3V 1.8V/1.8V 1.3V/1.3V 1.2V 1.2V 1.2V 3.3V TQFN55-40 -40°C to +85°C

ACT8934AQJ458-T 3.3V/3.3V 1.8V/1.8V 1.25V/1.25V 1.2V 1.2V 1.2V 3.3V TQFN55-40 -40°C to +85°C

All Active-Semi components are RoHS Compliant and with Pb-free plating otherwise specified. Standard product options are listed in this table. Contact factory for custom options. Minimum order quantity is 12,000 units. Refer to Push-Button Control section for the power control sequences of each part number. To select VSTBYx as the output regulation voltage for REGx, drive VSEL to logic high. VSTBYx can be set by software via I2C interface.

NC VP1 SW1 GP12 SW2 VP2 OUT2 CHGIN VSYS

PIN CONFIGURATION

TOP VIEW

ACTIVE A33KY25 DATE CODE
nRSTO nIRQ
nPBSTAT GP3 SW3 VP3

OUT3 PWREN
nLBO LBI

Thin - QFN TQFN55-40

Innovative PowerTM ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP.

Copyright 2012 Active-Semi, Inc.

PIN DESCRIPTIONS

PIN NAME

REFBP

Reference Bypass. Connect a 0.047uF ceramic capacitor from REFBP to GA. This pin is discharged to GA in shutdown.

OUT1 Output Feedback Sense for REG1.

Analog Ground. Connect GA directly to a quiet ground node. Connect GA, GP12 and GP3 together at a single point as close to the IC as possible.

OUT4

REG4 output. Capable of delivering up to 150mA of output current. Connect a 1.5µF ceramic capacitor from OUT4 to GA. The output is discharged to GA with resistor when disabled.

OUT5

REG5 output. Capable of delivering up to 150mA of output current. Connect a 1.5µF ceramic capacitor from OUT5 to GA. The output is discharged to GA with resistor when disabled.

Power Input for REG4, REG5, REG6, and REG7. Bypass to GA with a high quality ceramic capacitor placed as close to the IC as possible.

OUT7

REG7 output. Capable of delivering up to 250mA of output current. Connect a 2.2µF ceramic capacitor from OUT7 to GA. The output is discharged to GA with resistor when disabled.

OUT6
VNOM refers to the nominal output voltage level for VOUT as defined by the Ordering Information section. 2 IMAX Maximum Output Current.

MAX 90 1% 2%

UNIT V mV µA µA
%/V %/mA %VNOM %VNOM MHz kHz
µs ns

A µA

A µA

A µA

Innovative PowerTM ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP.
- 16 -

Copyright 2012 Active-Semi, Inc.

LOW-NOISE LDO ELECTRICAL CHARACTERISTICS

VINL = 3.6V, COUT4 = COUT5 = 1.5µF, COUT6 = COUT7 = 2.2µF, LOWIQ[ ] = [0], TA = 25°C, unless otherwise specified.

PARAMETER Operating Voltage Range Output Voltage Accuracy

Line Regulation

Load Regulation Power Supply Rejection Ratio

Supply Current per Output

Soft-Start Period Power Good Threshold Power Good Hysteresis Output Noise Discharge Resistance REG4 Dropout Voltage Maximum Output Current Limit Stable COUT4 Range REG5 Dropout Voltage Maximum Output Current

TEST CONDITIONS

VOUT 1.2V, TA = 25°C, IOUT = 10mA VOUT < 1.2V, TA = 25°C, IOUT = 10mA VINL = Max VOUT + 0.5V, 3.6V to 5.5V LOWIQ[ ] = [0] VINL = Max VOUT + 0.5V, 3.6V to 5.5V LOWIQ[ ] = [1] IOUT = 1mA to IMAX2 f = 1kHz, IOUT = 20mA, VOUT =1.2V f = 10kHz, IOUT = 20mA, VOUT =1.2V Regulator Enabled, LOWIQ[ ] = [0] Regulator Enabled, LOWIQ[ ] = [1] Regulator Disabled VOUT = 2.9V VOUT Rising VOUT Falling IOUT = 20mA, f = 10Hz to 100kHz, VOUT = 1.2V LDO Disabled, DIS[ ] = 1

IOUT = 80mA, VOUT > 3.1V

VOUT = 95% of regulation voltage

IOUT = 80mA, VOUT > 3.1V

MIN TYP MAX

VNOM

VNOM
140 280 150

Current Limit Stable COUT5 Range REG6 Dropout Voltage Maximum Output Current Limit Stable COUT6 Range REG7 Dropout Voltage Maximum Output Current Limit Stable COUT7 Range

VOUT = 95% of regulation voltage

IOUT = 120mA, VOUT > 3.1V VOUT = 95% of regulation voltage

IOUT = 120mA, VOUT > 3.1V VOUT = 95% of regulation voltage
140 280

UNIT V
mV/V

V/A dB
µs % % µVRMS
mV mA µF
mA µF
mV mA µF
mV mA µF
VNOM refers to the nominal output voltage level for VOUT as defined by the Ordering Information section.
2 IMAX Maximum Output Current.
3 Dropout Voltage is defined as the differential voltage between input and output when the output voltage drops 100mV below the regulation voltage for 3.1V output voltage or higher .

LDO current limit is defined as the output current at which the output voltage drops to 95% of the respective regulation voltage. Under heavy overload conditions the output current limit folds back by 30% typ .

Innovative PowerTM ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP.
- 17 -

Copyright 2012 Active-Semi, Inc.

ActivePathTM CHARGER ELECTRICAL CHARACTERISTICS

VCHGIN = 5.0V, TA = 25°C, unless otherwise specified.

PARAMETER ActivePath CHGIN Operating Voltage Range CHGIN UVLO Threshold CHGIN UVLO Hysteresis CHGIN OVP Threshold CHGIN OVP Hysteresis

CHGIN Supply Current

CHGIN to VSYS On-Resistance

CHGIN to VSYS Current Limit

VSYS REGULATION VSYS Regulated Voltage nSTAT OUTPUT nSTAT Sink current nSTAT Leakage Current ACIN AND CHGLEV INPUTS CHGLEV Logic High Input Voltage CHGLEV Logic Low Input Voltage CHGLEV Leakage Current ACIN Voltage Thresholds ACIN Hysteresis Voltage ACIN Leakage Current TH INPUT TH Pull-Up Current VTH Upper Temperature Voltage Threshold VTHH VTH Lower Temperature Voltage Threshold VTHL VTH Hysteresis

TEST CONDITIONS

CHGIN Voltage Rising CHGIN Voltage Falling CHGIN Voltage Rising CHGIN Voltage Falling VCHGIN < VUVLO VCHGIN < VBAT + 50mV, VCHGIN > VUVLO VCHGIN > VBAT + 150mV, VCHGIN > VUVLO Charger disabled, IVSYS = 0mA IVSYS = 100mA ACIN = VSYS ACIN = GA, CHGLEV = GA ACIN = GA, CHGLEV = VSYS

IVSYS = 10mA

VnSTAT = 2V VnSTAT = 4.2V

VCHGLEV = 4.2V ACIN voltage rising ACIN voltage falling VACIN = 4.2V

VCHGIN > VBAT + 100mV, Hysteresis = 50mV Hot Detect NTC Thermistor

Cold Detect NTC Thermistor Upper and Lower Thresholds

MIN TYP MAX UNIT
100 200 µA
400 450 500
12 mA
91 102 110 µA V

Innovative PowerTM ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP.
- 18 -

Copyright 2012 Active-Semi, Inc.

ActivePathTM CHARGER ELECTRICAL CHARACTERISTICS CONT’D

VCHGIN = 5.0V, TA = 25°C, unless otherwise specified.

PARAMETER

TEST CONDITIONS

CHARGER

ISET Pin Voltage

Fast Charge Precondition

Charge Termination Voltage VTERM

TA = -20°C to 70°C TA = -40°C to 85°C

ACIN = VSYS, CHGLEV = VSYS

Charge Current

VBAT = 3.8V RISET = 6.8K
More datasheets: XF-00160-2030 | 7324-15SUBC/S400-X9 | 277200110202002 | 277200110200002 | 3579 | U5021M-NFP | CS-UDUINO-01 | ADNK-2623 | FIT0437 | RER101-36/12/12P


Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived EA8934A Datasheet file may be downloaded here without warranties.

Datasheet ID: EA8934A 522725